[00/11] fbdev/sbus: Initializers for struct fb_ops

Add initializer macros for struct fb_ops of drivers that operate
on SBUS-based framebuffers. Also add a Kconfig token to select the
correct dependencies.

All drivers for SBUS-based framebuffers use the regular helpers
for framebuffers in I/O memory (fb_io_*() and cfb_*()). Each driver
provides its own implementation of mmap and ioctls around common
helpers from sbuslib.o. Patches 1 to 3 clean up the code a bit and
add a initializer macros that set up struct fb_ops correctly.

Patches 4 to 11 convert the drivers. Each patch slightly renames
the driver's mmap and ioctl functions so that it matches the name
pattern of sbuslib.o.

Like the other fbdev initializer macros, the SBUS helpers are
easily grep-able. In a later patch, they can be left to empty values
if the rsp. functionality, such as file I/O or console, has been
disabled.

There are no functional changes. The helpers set the defaults that
the drivers already use. The fb_io_*() functions that the initializer
macro sets are the defaults if struct fb_ops.fb_read or .fb_write are
NULL. After all drivers have been updated to set them explicitly, the
defaults can be dropped and the functions can be made optional.

Build-tested on sparc64.

Thomas Zimmermann (11):
  fbdev/sbus: Build sbuslib.o if CONFIG_FB_SBUS has been selected
  fbdev/sbus: Forward declare all necessary structures in header
  fbdev/sbus: Add initializer macros and Kconfig tokens for SBUS support
  fbdev/bw2: Use initializer macro for struct fb_ops
  fbdev/cg14: Use initializer macro for struct fb_ops
  fbdev/cg3: Use initializer macro for struct fb_ops
  fbdev/cg6: Use initializer macro for struct fb_ops
  fbdev/ffb: Use initializer macro for struct fb_ops
  fbdev/leo: Use initializer macro for struct fb_ops
  fbdev/p9100: Use initializer macro for struct fb_ops
  fbdev/tcx: Use initializer macro for struct fb_ops

 drivers/video/fbdev/Kconfig   | 30 ++++++++++++----------------
 drivers/video/fbdev/Makefile  | 17 ++++++++--------
 drivers/video/fbdev/bw2.c     | 17 +++++-----------
 drivers/video/fbdev/cg14.c    | 19 ++++++------------
 drivers/video/fbdev/cg3.c     | 17 +++++-----------
 drivers/video/fbdev/cg6.c     | 17 ++++++++--------
 drivers/video/fbdev/ffb.c     | 17 ++++++++--------
 drivers/video/fbdev/leo.c     | 19 ++++++------------
 drivers/video/fbdev/p9100.c   | 18 +++++------------
 drivers/video/fbdev/sbuslib.h | 37 ++++++++++++++++++++++++++++++++++-
 drivers/video/fbdev/tcx.c     | 20 ++++++-------------
 11 files changed, 106 insertions(+), 122 deletions(-)

Hi Thomas,

On Sun, Aug 06, 2023 at 01:58:51PM +0200, Thomas Zimmermann wrote:
> Add initializer macros for struct fb_ops of drivers that operate
> on SBUS-based framebuffers. Also add a Kconfig token to select the
> correct dependencies.
> 
> All drivers for SBUS-based framebuffers use the regular helpers
> for framebuffers in I/O memory (fb_io_*() and cfb_*()). Each driver
> provides its own implementation of mmap and ioctls around common
> helpers from sbuslib.o. Patches 1 to 3 clean up the code a bit and
> add a initializer macros that set up struct fb_ops correctly.
> 
> Patches 4 to 11 convert the drivers. Each patch slightly renames
> the driver's mmap and ioctl functions so that it matches the name
> pattern of sbuslib.o.
> 
> Like the other fbdev initializer macros, the SBUS helpers are
> easily grep-able. In a later patch, they can be left to empty values
> if the rsp. functionality, such as file I/O or console, has been
> disabled.
> 
> There are no functional changes. The helpers set the defaults that
> the drivers already use. The fb_io_*() functions that the initializer
> macro sets are the defaults if struct fb_ops.fb_read or .fb_write are
> NULL. After all drivers have been updated to set them explicitly, the
> defaults can be dropped and the functions can be made optional.

I have looked thought it all and it looks good.
I throw it after my sparc32 build setup - also OK.

cg6 and ffb uses their own imageblit and friends, but this is nicely
handled in the patches.
I also like how you managed to handle the compat case.

All are:
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>

	Sam

Hi Sam

Am 07.08.23 um 19:11 schrieb Sam Ravnborg:
...
> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>

I completely missed your review. Thanks a lot. I've now pushed the 
patches to drm-misc-next.

Best regards
Thomas

> 
> 	Sam